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Damm [24]
3 years ago
13

Without using a calculator, determine the number of real zeros of the function

Mathematics
1 answer:
Natalija [7]3 years ago
4 0

Answer:

1, -6

Step-by-step explanation:

Since there are alike numbers, add them together.

4x+x= 5x

Now the function is: f(x)= x^{2}+5x-6

The function is in  a^{2}+bx+c form.

So find the factors of a x c = b.

Factors of -6(a) that fits (b)5 is (-1,6).

Then you just factor it:

f(x)= x^{2}+5x-6

(x-1)(x+6)

x-1= 0  x+6=0

 +1 +1     -6  -6

x=1      x=-6

Those are the real zeroes: 1, -6

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Given x(y + 2) = 3x + y, express y in terms of x.​
vodka [1.7K]

Answer:

y = \frac{x}{x-1}

Step-by-step explanation:

Given

x(y + 2) = 3x + y ← distribute parenthesis on left side

xy + 2x = 3x + y ( subtract 2x from both sides )

xy = x + y ( subtract y from both sides )

xy - y = x ← factor out y from each term on the left side )

y(x - 1) = x ← divide both sides by (x - 1)

y = \frac{x}{x-1}

6 0
3 years ago
What is the rule: 1, 5, 25, 125,
Inga [223]

Answer:

1x5^{n-1}

We do n-1 so the first term is 1x5^{0} and the pwoer of zero makes the number 1 so the pattern is still correct because 1x1=1

Double check the equation is true

Second term is 1x5^{2-1}

1x5=5

If you don't want the equation you just multiply 5 each time

Hope this helps

Step-by-step explanation:

7 0
3 years ago
Pair of linear equation in 2 variables graphical method<br> 2x-y+1=0<br> x-2y+8=0<br> Pls help
son4ous [18]

Step-by-step explanation:

2x-y= -1

x-2y= -8

eqn2*2=2x-4y= -16

eqn3- eqn1

-3y=- -15 y=5

2x-5= -1

2x=4 x=2

3 0
4 years ago
How to draw a quadrilateral with no square corners
Solnce55 [7]
A trapezoid doesn't have any square corners
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3 years ago
two groups of students order cheeseburgers and chicken nuggets at mcdonald’s. one order of 9 cheeseburgers and 4 chicken nuggets
BlackZzzverrR [31]

Answer:

$1.19

Step-by-step explanation:

Let the cost of a cheeseburger be $b and that of a chicken nugget be $n.

From the given information, we can form 2 equations.

9b +4n= 22.37 -----(1)

3b +4n= 15.23 -----(2)

Notice that the 2 equations have '4n' in them. I'll be using elimination method to solve the equation by getting rid of the 4n.

(1) -(2):

9b +4n -(3b +4n)= 22.37 -15.23

9b +4n -3b -4n= 7.14

6b= 7.14 <em>(</em><em>simplify</em><em>)</em>

b= 7.14 ÷6 <em>(</em><em>÷</em><em>6</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>

b= 1.19

Thus, a cheeseburger cost $1.19.

8 0
4 years ago
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